Improvement in lifting-jacks



,l 0. JOYCE.

Lifting-Jack.

No. 210,946.A

Patented Dec. 17,1878.

vmm @y MPFIERS. FHOWLITHOGRAPNER, WASMINGTDN. [1C` UNITED STATES PATENT JACOB O. JOYCE, OF DAYTON, OHIO.

IMPROVEMENT IN LIFTING-JACKS.

Specification forming part of Letters Patent No. 210,946, dated December 17 1878; application filed August 30, 1873.

To all whom it may concern.'

Be it known that L'JAGOB O. JOYCE, of the city of Dayton, Montgomery county, Ohio, have invented e new and useful Improvement in Lifting-Jacks, which improvement is fully set forth in the following;` specification, reference being` had to the accompanying drawings.

This invention relates to the class known as lever-jacks.

A is jche frame of the jack; B, the liftingbar; I?, the liftingqiawl; H, the Ina-in lever, provided with a socket for the insertion of n turned wooden handle; c and d, short levers, constituting a, knuckle-joint; e, :L short link, connecting c and d with I-I.

EDWIN L. GRIDLAND, TEos. H. CRIDLAND. 

